(registered by RFC4351)
MIME media type name: audio
MIME subtype name: t140c
Required parameters:
rate: The RTP timestamp clock rate, which is equal to the
sampling rate. This parameter SHOULD have the same value as
for any audio codec packets interleaved in the same RTP
stream.
Optional parameters:
cps: The maximum number of characters that may be received
per second. The default value is 30.
Encoding considerations: T.140 text can be transmitted with RTP
as specified in RFC 4351.
Security considerations: See section 8 of RFC 4351.
Interoperability considerations: None
Published specification: ITU-T T.140 Recommendation.
RFC 4351.
Applications which use this media type:
Text communication systems and text conferencing tools that
transmit text associated with audio and within the same RTP
session as the audio, such as PSTN gateways that transmit
audio and text signals between two PSTN textphone users
over an IP network.
Additional information: This type is only defined for transfer
via RTP.
Magic number(s): None
File extension(s): None
Macintosh File Type Code(s): None
Person & email address to contact for further information:
Paul E. Jones
E-mail: paulej&packetizer.com
Intended usage: COMMON
Author / Change controller:
Paul E. Jones | IETF avt WG delegated from the IESG
paulej&packetizer.com |